/*
  quickpainterpath.cpp

  This file is part of the KDAB State Machine Editor Library.

  Copyright (C) 2014-2020 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com.
  All rights reserved.
  Author: Kevin Funk <kevin.funk@kdab.com>

  Licensees holding valid commercial KDAB State Machine Editor Library
  licenses may use this file in accordance with the KDAB State Machine Editor
  Library License Agreement provided with the Software.

  This file may be distributed and/or modified under the terms of the
  GNU Lesser General Public License version 2.1 as published by the
  Free Software Foundation and appearing in the file LICENSE.LGPL.txt included.

  This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

  Contact info@kdab.com if any conditions of this licensing are not
  clear to you.
*/

#include "quickpainterpath_p.h"

QuickPainterPathStroker::QuickPainterPathStroker(QObject* parent)
    : QObject(parent)
{
}

qreal QuickPainterPathStroker::width() const
{
    return m_stroker.width();
}

void QuickPainterPathStroker::setWidth(qreal width)
{
    if (qFuzzyCompare(m_stroker.width(), width))
        return;

    m_stroker.setWidth(width);
    emit widthChanged(width);
}

QPainterPath QuickPainterPathStroker::createStroke(const QPainterPath& path) const
{
    return m_stroker.createStroke(path);
}

QuickPainterPath::QuickPainterPath(QObject* parent)
    : QObject(parent)
    , m_isEmpty(true)
{
}

QPainterPath QuickPainterPath::path() const
{
    return m_path;
}

void QuickPainterPath::setPath(const QPainterPath& path)
{
    if (m_path == path)
        return;

    m_path = path;
    emit pathChanged(path);

    updateState(path);
}

QPointF QuickPainterPath::startPoint() const
{
    return m_startPoint;
}

QPointF QuickPainterPath::endPoint() const
{
    return m_endPoint;
}

bool QuickPainterPath::isEmpty() const
{
    return m_isEmpty;
}

void QuickPainterPath::moveTo(const QPointF& point)
{
    m_path.moveTo(point);
    updateState(m_path);
}

void QuickPainterPath::lineTo(const QPointF& endPoint)
{
    m_path.lineTo(endPoint);
    updateState(m_path);
}

void QuickPainterPath::clear()
{
    setPath(QPainterPath());
}

bool QuickPainterPath::contains(const QPointF& point) const
{
    return m_path.contains(point);
}

qreal QuickPainterPath::angleAtPercent(qreal t) const
{
    return m_path.angleAtPercent(t);
}

void QuickPainterPath::updateState(const QPainterPath& path)
{
    QPointF newStartPoint = path.pointAtPercent(0.0);
    if (newStartPoint != m_startPoint) {
        m_startPoint = newStartPoint;
        emit startPointChanged(m_startPoint);
    }
    QPointF newEndPoint = path.pointAtPercent(1.0);
    if (newEndPoint != m_endPoint) {
        m_endPoint = newEndPoint;
        emit endPointChanged(m_endPoint);
    }
    bool newIsEmpty = path.isEmpty();
    if (newIsEmpty != m_isEmpty) {
        m_isEmpty = newIsEmpty;
        emit isEmptyChanged(m_isEmpty);
    }
}

QuickPainterPathGeometryItem::QuickPainterPathGeometryItem(QQuickItem* parent)
    : QuickGeometryItem(parent)
{
    setDrawingMode(GL_LINE_STRIP);
}


QPainterPath QuickPainterPathGeometryItem::path() const
{
    return m_path;
}

void QuickPainterPathGeometryItem::setPath(const QPainterPath& path)
{
    if (m_path == path)
        return;

    m_path = path;
    updateData();
    emit pathChanged(m_path);
    emit changed();
}

void QuickPainterPathGeometryItem::updateData()
{
    // update data
    m_vertexCoordinates.clear();
    if (!m_path.isEmpty()) {
        m_vertexCoordinates.addPath(qtVectorPathForPath(m_path), 1.);
    }
    QOpenGLPoint* points = m_vertexCoordinates.data();
    const int vertexCount = m_vertexCoordinates.vertexCount();
    QList<qreal> vertexData;
    vertexData.reserve(vertexCount*2);
    for (int i = 0; i < vertexCount; ++i) {
        vertexData << points[i].x;
        vertexData << points[i].y;
    }
    setVertexData(vertexData);
}
